Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H19/00—Changing the web roll
  • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H19/00—Changing the web roll
  • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
  • B65H19/2207—Changing the web roll in winding mechanisms or in connection with winding operations the web roll being driven by a winding mechanism of the centre or core drive type
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H19/00—Changing the web roll
  • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
  • B65H19/29—Securing the trailing end of the wound web to the web roll
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2403/00—Power transmission; Driving means
  • B65H2403/50—Driving mechanisms
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2404/00—Parts for transporting or guiding the handled material
  • B65H2404/40—Shafts, cylinders, drums, spindles
  • B65H2404/43—Rider roll construction
  • B65H2404/433—Rider roll construction involving at least one rider roller following a spindle moved on a path, e.g. arcuate or circular path
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2555/00—Actuating means
  • B65H2555/10—Actuating means linear
  • B65H2555/11—Actuating means linear pneumatic, e.g. inflatable elements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2601/00—Problem to be solved or advantage achieved
  • B65H2601/20—Avoiding or preventing undesirable effects
  • B65H2601/25—Damages to handled material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2701/00—Handled material; Storage means
  • B65H2701/10—Handled articles or webs
  • B65H2701/17—Nature of material
  • B65H2701/175—Plastic
  • B65H2701/1752—Polymer film

Definitions

• the present invention relates to an accompanying squeezing unit in a machine for winding plastic film onto bobbins .
• reels i.e. a series of reels (typically 3, but also 2 or 4 or more) have in fact been asserted. These reels are assembled equidistant from a common absolute rotation center and the plastic film produced by the line is alternatingly wound onto the spindles of these reels.
• This pressure cylinder of the film being wound acts on the surface of the bobbin and has a double function.
• a general objective of the present invention is to solve the above-mentioned drawbacks of the known art, in an extremely simple, economical and functional way.
• a further objective of the present invention is to provide an accompanying squeezing unit in a machine for winding plastic film onto bobbins, which avoids the possibility of entraining air during the rotation of the spindle of the reel with respect to the absolute rotation centre of the reels of the machine.
• Yet another objective of the present invention is to provide a squeezing unit which, while solving the above drawbacks, does not slow down the functioning of the machine and the bobbin change.
• an accompanying squeezing unit of a winding machine of plastic film onto bobbins has been conceived, having the characteristics specified in the enclosed claims .
• Figure 1 is a schematic front raised view of a winding machine of plastic film onto bobbins, equipped with an accompanying squeezing unit of plastic film produced according to the invention
• Figure 2 is a raised side view showing the positions of some of the various elements forming the accompanying squeezing group of plastic film of the present invention, of which some elements are shown in different operational positions ;
• Figures 3 to 7 show fully schematic views of some operational phases of the accompanying squeezing group of the present invention.
• this illustrates a schematic view of a raised front view of a winding machine of plastic film onto bobbins equipped with an accompanying squeezing group of plastic film produced according to the invention, indicated as a whole with 105.
• This accompanying squeezing group of plastic film 105 is positioned inside the structure consisting of two vertical uprights 12, 13 which form the shoulder of a frame of the winding machine.
• a first upright 12 carries cantilevered, on a rotating supporting plate 14, a central shaft 15, supported at the other end by the second upright 13.
• the plate 14, rotating around the central shaft 15, also carries three spindles 16, 17 and 18, positioned at 120° with respect to each other, which complete the winding reel.
• the total number of reels is equal to 3, but can generally vary from 2 to 4 or more.
• Figure 2 shows a raised side view illustrating some of the various elements forming the accompanying squeezing unit of plastic film 105 of the invention, some of which are shown in different positions.
• This squeezing group 105 of the invention has in fact been specifically envisaged for avoiding the . capturing of air on the part of a plastic film 41 of bobbins 35 being wound, arranged on a spindle 16.
• the squeezing group 105 comprises an accompanying squeezing roll 106 (in the example, idle, but it can also be motorized) positioned at the end of a lever mechanism selectively actuated for maintaining the squeezing roll 106 on the film 41 in the final winding onto a bobbin 35 situated on a spindle 16, for example. This action must be effected when the plate 14 carrying the spindles, is rotated in order to discharge a finished bobbin.
• the lever mechanism consists of an arrangement of articulated levers, commanded to rotate-oscillate by means of respective actuators.
• the lever mechanism carrying the squeezing roll 106 is produced as follows.
• the squeezing roll 106 is positioned on first free ends of two first levers 107 with the interpositioning of bearings 108 (figure 1) .
• the two first levers 107 are parallel to each other and spaced from each other, at the two extreme sides of the squeezing roll 106.
• the two first levers 107 at the second ends are connected by means of a small shaft or pins 109 to further two second levers 110, in turn connected by means of a small shaft 111 supported by bearings 112 on a frame 47 of the machine, partially schematized with interposed supporting elements, to complete the lever mechanism.
• the two second levers 110 have a shaped form at one end where a buffer or abutment surface 113 is created for an adjustable stop 104, such as a screw, positioned with respect to a portion of frame 47 (figure 2) .
• Each of the two first levers 107 and the other two second levers 110 is moved in oscillation between an operating position and a discharging position by a pair of actuators 114 and 115, respectively, each consisting, for example, of a single-acting (simple-effect) pneumatic cylinder .
• the actuators 114 of the two first levers 107 are positioned at one end of one of their stems 116 connected by means of pins 117 in an intermediate area with respect to the first levers 107.
• the bodies of the cylinders 114 are connected by means of pins 118 in an intermediate area with respect to the second levers 110.
• the actuators 115 of the two second levers 110 are positioned at one end of one of their stems 119 connected by means of pins 120 in an end area of the second levers 110.
• the cylinders 115 are connected by means of pins 121 to a portion of the frame 47 of the machine.
• both the first levers 107 and the second levers 110 are caused to rotate, or better to reciprocally oscillate by means of the respective actuators 114, 115. This is effected in order to maintain the squeezing roll 106 of the group, produced according to the invention, in contact with a bobbin 35 in final winding onto a spindle 16 among the spindles 16, 17, 18 of the winding machine. This action must be effected during the rotation of the plate 14 carrying the spindles (in the example 16, 17, 18,) towards a bobbin- discharge position.
• Figures 3 to 7 show, in fully schematic views, some operational phases of the squeezing group 105 of the invention.
• this represents a normal winding phase in which the squeezing roll 106 is kept in contact with the bobbin 35, whereas a normal pressure-winding roll 122 guides the film 41 to be wound around a core 43 positioned on the spindle 16 for forming the bobbin 35.
• the stems 116 and 119 of the cylinders 114 and 115 are at least partially extended.
• FIG 4 shows an immediately subsequent phase in which the plate 14 starts rotating around its center defined by the shaft 15.
• the squeezing roll 106 prevents the entrapment of air in the bobbin 35, which would otherwise take place due to the loss of contact with the pressure- winding roll 122 with the same bobbin 35.
• This movement of the squeezing roll 106 is enabled by the rotation of the first levers 107 caused by the action of the respective cylinders 114, whereas the second levers 110 can still remain stationary. This obviously also takes place in relation to the geometry of the lever mechanism thus produced by the two pairs of levers 107 and 110, and also by the respective hinging.
• FIG. 5 shows a subsequent phase in which the continued rotation of the plate 14 causes an absolute detachment of the pressure-winding roll 122 from the bobbin 35. It is therefore clearly evident that the absence of the entrainment of air is only due to the presence of the squeezing group of the invention.
• the squeezing roll 106 in fact, thanks to the presence of the two pairs of levers 107 and 110 and respective cylinders 114 and 115 which suitably move them, remains “stuck” to the surface of the bobbin 35. This contact also keeps the film 41 "stuck" to the outer surface of the bobbin, without any intrusion of air between film and bobbin.
• Figure 6 is again a further rotation phase of the plate 14 and yet another adaptation phase of the squeezing roll 106 with a variation in the position of the spindle 16 carrying the bobbin 35.
• Figure 7 shows the situation when the bobbin 35, or rather the film 41 still leaving the bobbin as a tail, must be cut by a specific transversal cutting blade 60 of the film 41, which is part of a cutting device present on the winding machine.
• Figure 2 shows, in both a continuous and dashed line, the possibility of movement of the first and second levers 107 and 110.
• the first and second levers 107 and 110 return to their initial rest position, ready to bring the accompanying squeezing roll 106 towards the subsequent new bobbin 35 carried by a subsequent spindle 17 in the next changing cycle.
• the squeezing group advantageously prevents the entrainment of air between subsequent coils of film during the bobbin- change phase.
• the bobbins thus obtained are consequently perfectly wound and their subsequent coils are well aligned and compact, obtaining a high-quality bobbin.

Landscapes

• Winding Of Webs (AREA)
• Replacement Of Web Rolls (AREA)
• Shaping Of Tube Ends By Bending Or Straightening (AREA)
• Auxiliary Devices For And Details Of Packaging Control (AREA)
• Basic Packing Technique (AREA)
• Manufacture Of Motors, Generators (AREA)

Priority Applications (9)

Applications Claiming Priority (2)

Publications (1)

Family

ID=49486566

Family Applications (1)

Country Status (11)

Families Citing this family (3)

Citations (6)

Family Cites Families (27)

• 2013
  • 2013-09-25 IT IT001579A patent/ITMI20131579A1/it unknown
• 2014
  • 2014-09-19 JP JP2016544735A patent/JP6558592B2/ja not_active Expired - Fee Related
  • 2014-09-19 US US15/022,400 patent/US10017347B2/en active Active
  • 2014-09-19 WO PCT/EP2014/002543 patent/WO2015043733A1/en active Application Filing
  • 2014-09-19 EP EP14777517.5A patent/EP2941397B2/en active Active
  • 2014-09-19 CA CA2924131A patent/CA2924131C/en active Active
  • 2014-09-19 MX MX2016003851A patent/MX371097B/es active IP Right Grant
  • 2014-09-19 RU RU2016109776A patent/RU2663057C2/ru active
  • 2014-09-19 CN CN201480052873.5A patent/CN105579374A/zh active Pending
  • 2014-09-19 KR KR1020167010815A patent/KR102219496B1/ko active IP Right Grant
  • 2014-09-19 BR BR112016006436-4A patent/BR112016006436B1/pt active IP Right Grant

Patent Citations (6)

Also Published As

Similar Documents

Legal Events